If you’ve traded with renko bars in the past, you know their unique ability to filter market noise.
But you soon discover that the best brick size for your market changes from session to session, even hour to hour.
What worked beautifully in yesterday’s trend move finds you stuck in a tight cyclical market today with few opportunities, and poor risk-reward. This can mean either standing aside completely, or taking low quality trades. Frustrating.
One approach to overcome this has been to take a percentage of yesterday’s Average True Range (ATR), say 10%, and use that for the today’s brick size. There are three problems with this approach:
The percentage applied is arbitrary
It is still essentially fixed; it doesn't adapt to today's market
It doesn’t tell you what the best bar size actually was